Hoisting apparatus



2 'Shets-Sheet 1.

(No Model.)

0. H. NOTTER. HOISTING APPARATUS.

No. 600,499. Patented Mar; 8,1898.

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(No Model.) 2 Sheets-Sheet 2.

C. H. NOTTER.

HOISTING APPARATUS.

No 600,499. Patented Mar. 8,1898.

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UNTTED STATES PATENT OFFICE.

CHARLES H. NOTTER, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO IVALTERS. BOGLE,,OF SAME PLACE.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 600,499, dated March 8,1898.

Application filed May 16, 1896. $erial No. 591,760. (No model.)

To all whom it may concern-.-

Be it known that I, CHARLES H. NOTTER, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois,haveinvented certain new and useful Improvements in Hoisting Apparatus, ofwhich the following is a specification.

This invention relates to improvements in a hoisting apparatus, and moreparticularly to that class of hoisting apparatus in which a bucket is soconnected with the hoisting apparatus that the bucket may be lowered inthe open position and the sections thereof closed upon the material andthe bucket then raised with its load. In a hoisting apparatus of thischaracter there is employed a lifting and holding cable by means ofwhich the bucket and its tackle are suspended and held in position forloading and afterward raised, a main closing-cable operating upon a drumor large sheave, and closing-cables turned over hubs, drums, or sheaveson the headblock and on the frame, whereby the rotation of the drum iscaused to effect the closing of the bucket-sections. Heretofore thesehoistin g-buckets have usually been pivoted at their upper adjacentedges or corners to a shaft carrying the main winding-drum, said drumhavinghubs on which the closing-chains wind, and a head-block havingsheaves over which the closing-chains turn. This construction isobjectionable for the reason that the drumshaft and the hubs projectinto the interior space of the bucket and are consequently brought intoclose contact with and are surrounded by the material which is beinghoisted. I obviate this difficulty by mounting the hoisting-drum in thehead-block and by providing said drum with hubs upon which theclosing-cables wind. I provide the pivotshaft of the bucket-sectionswith sheaves, over which the closing-cables are drawn. By thisconstruction I remove the winding-drun1 and its hubs from contact withthe material to be hoisted, thus increasing the load capacity of, thebucket and obviating the objections heretofore existing in the cloggingor coating of the drum and hubs and the cables wound thereon with thematerial being hoisted. By this arrangement also the weight of the drum,its hubs, and cables is added to that of the head-block, such weightbeing converted into power in the closing operation.

In the accompanying drawings, Figure 1 is an end elevation showing thebucket in the closed position, the secondary or open position beingindicated by dotted lines. Fig. 2 is a side elevation.

In the drawings let A represent the headblock, provided with bearingsfor the drumshaft B and for the pivot-arms C, by means of which the armsare pivotally connected to said head-block, the outer ends of said armsbeing pivotally connected to the bucket-sections E E in the usualmanner. Said bucketsections are pivoted to the shaft F at their upperadjacent edges, and said shaft F carries the sheaves G G. Upon thedrum-shaft is mounted the drum H, having the hubs I I.

Closing-cables J J are made fast at one end,

as jj, to the outer ends of these hubs, and they are also made fast attheir inner ends, as by the links z t", to the head-block.

K represents a hoisting and holding cable made fast to the upper end ofthe head-block,

, and L represents a main closing-cable, which is made fast at one endto the drum.

The operation is as follows: The bucket is lowered with its sectionsopen, as shown by the dotted lines in Fig. 1, and is held in properplace by the cable K. Thereupon the cable L is drawn so as to unwindfrom the drum, thereby causing the cables J and J to wind upon the hubsI and I, and thereby through the arms forcing the bucket-sectionstogether and taking on the load. In this closing action the weight ofthe head-block, drum, and hoisting-tackle is transferred through arms tothe outer edges of the bucket-sections, and said arms acting as leversthe weight of said parts is thereby converted into power. Of course inthe closing operation the shaft, to which the bucket-sections arepivoted, and the head-block approach each other as the closing-chainswind upon the hubs; but the drum and the hoisting-cables are maintainedout of contact with the material.

My invention may be applied to other hoisting apparatus than theparticular one herein illustrated and described, and in its broadestscope is not therefore limited to a use in connection withhoisting-buckets, although it ing from the scope of my invention.

has certain features of advantage peculiar to this type of apparatus.The details of construction may also be varied Without depart- Thedrum-shaft may be provided with sheaves instead of the hubs, and theauxiliary closingcables may be turned around the pivot-shaft, or thesheaves may be otherwise mounted on they bucket-frame. Of course asingle auxiliary closing-cable may be employed.

I claim In a hoisting apparatus, the combination of a head-block, a drummounted thereon, hubs connected to said drum, a transverse shaft belowsaid head-block, bucket-sections scribed.

CHARLES H. NOTTER. WVitnesses:

O. O. LINTHIOUM, E. L. HUBER.

